Vegas Winner Casino - Refer a friend bonus not given

Hello! I I just signed up to this casino. A friend of mine invited me! I deposited, and I got first deposit bonus! (125 % + 50 free spins). I lost all! When i wanted to ask my refer a friend bonus (50 eur)in the chat, there the lady said, it's impossible, because i got first deposit! It's unbelievable! I didnt find this info in their T and C! Help please! username: jozsefsimi3